Barely Significant
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The effect of occupational lead exposure on blood levels of zinc, iron, copper, selenium and related proteins.

Biol Trace Elem Res · 2012 · PMC3510413 · PMID 22923205

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marginal significanceno p-value reported
Therefore, to expect that increased lead levels inhibit the uptake of Fe as is postulated by some authors would be unreasonable [ 28 ] because workers are exposed to lead primarily through the respiratory tract and competitive binding of lead and Fe or Zn to divalent metal transporters in the intestine should have marginal significance in occupational exposure.

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